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(No Model.) I 4 Sheets-Sheet 1. J. GILDERSLEEVE.

ORGAN.

No. 439,397. Patented Oct. 28, 1890.

(No Model.) 4 SheetsSheet 2.

J. GILDERSLEEVE.

ORGAN.

N0. 439,397. latented Oct. 28, 1890.

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J. GILDERSLEEVE.

ORGAN.

No. 439,397. Patented Oct. 28, 1890.

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(No Model.) 4 Sheets-Sheet 4. J. GILDERSLEEVE.

ORGAN.

No. 439,397. Patented Oct. 28, 1890.

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UNITED STATES PATENT OFFICE.

JOSEPH GILDERSLEEVE, OF LONDON, ENGLAND, ASSIGNOR TO JOHN TREADWAYHANSON, OF SAME PLACE.

ORGAN.

SPECIFICATION forming part of Letters Patent No. 439,397, dated. October28, 1890.

Application filed February 26, 1890- Serial No. 341,802. (No model.)

To all whom it may concern.-

Be it known that I, JOSEPH GILDERSLEEVE, a subject of the Queen of GreatBritain, residing at London, England, have invented new and usefulImprovements in and relating to Organs, of which the following is. aspecification.

This invention relates, chiefly, to the construction of a chamberpipe-organthat is to say, an organ suitable for a drawing-room as itwill occupy no more floor-space than an ordinary cottage-piano.

In my improved organ all the notes of the instrument are organ-pipes,and are voiced to sound Well in a drawing-room.

In order to enable my invention to be fully understood, 1 will describehow it can be carried into practice by reference to the accompanyingdrawings, in which Figures 1 and 2 are a front and side elevation,respectively, of a chamber pipe-organ constructed according to myinvention and having three stops of pipes, forming four draws. Fig. 3 isa central vertical section of the organ; and Fig. 4c is a frontsectional elevation of the same, the section being taken on the line ataof Fig. 3. In this figure the pipes and'pallets are shown removed forthe sake of clearness. Fig. 5 is a section of the lower part of thefront of the swell-case, and Fig. 6 is an elevation of a part of thesame.

Similar reference-letters indicate similar parts throughout thedrawings.

I11 carrying out my invention I employ a wood case a, Figs. 1 to 4,closed up to a height slightly above the level of the key-board Z), thetop forming the sound-board c, on which can be placed a series of stopsof pipes. In the drawings two stops of pipes are shown so placed, thesaid stops being marked d and 6, respectively. All the pipes are placedin the natural order of the scale, as shown clearly in Figs. 1 and 2, inwhich figures the pipes represent portions of the stops (1 and 6. Bythis arrangement the pallet g of each pipe is nearest to the key 9'which operates it, whereby I do away with the usual roller-board (whichis part of the action of an ordinary organ) and make the action asdirect or quick and easy as that of a piano, and also economize spaceand expense.

71 is the swell-case which I arrange to form the back portion of the topof the instrument. On the front of the swell-case and facing thekey-board I place the swell-shutters h, which can be operated in theusual manner by the knee of the performer through the medium of a lever72?, lever k rod h cranks 71 71 and rod 71 The whole of the lower partofthe case a is, nearly up to the level of thekey-board, utilized for thebellows t', as shown clearly in Fig. 3, the feed being worked by twopedals t" t" in the usual manner. An escapement-valve of the usualconstruction is provided to relieve the bellows when fully inflated.This valve is not shown in the drawings.

Immediately over the bellows, at the back portion of the instrument, islocated the sound-board j, on which stands the third stop of pipes j,inclosed in the swell h. The soundboard 7' may be at any convenientlevel below the sound-board c of the front pipes, so as to allow ofemploying any required height of pipes j.

The two stops of pipes (Z and e are worked with slides k and Z in theordinary manner that is to say, horizontally and immediately under thepipesthe stop cl being worked by the slide 7t and the stop 6 by theslide Z and another slide, (not shown,) the two slides correspondingwith the two portionsviz., base and treble-into which the said stop 6 isdivided; but according to my invention the swell-pipes are worked by aslide 111, placed vertically at the back of the divisions over eachpallet and at a right angle to the top of the sound-board All theseslides draw with hit-and-miss holes in the usual manner, and areconnected to the draw-rods a through the medium of levers n, rods a andbell-cranks of. There being but one set of pallets g, the wind has to beconveyed to the swell-pipes, and I effect this by forming the fines orairconveyers in the thickness of the material of the front of theswell-case in the following manner:

The lower part of the front of the swell-case h is made in threethicknesses, as shown ato 0' 0 in Figs. 3 and 5, the inner thickness 0having marked on it the lines of flues, which take the direction thatthe ordinary metal airconveying pipes would take. These are afterwardcut out in any suitable mannersucl1 as by means of a fret-sawas shown atp in Fig. 6, which represents an elevation of a portion of the saidthickness. The thickness 0' is then glued between the two otherthicknesses 0 and 0 of suitable 1naterialsuch as veneers of hard woodandholes q are pierced where required at the ends of the flues 19 within.These holes correspond with holes 1' in the draw-slide m of theswell-stop and also with fiues s in the sound-board j, which is alsomade in three thicknesses with the flues s in a similar manner to thelower part of the front of the swell-case.

s, 8 and s indicate the thicknesses of the sound-board j, the fluesbeing formed in the thickness 5 and connected to the pipes j by holes 9'It will be obvious that the flues pandsmay be cut to any curve, therebyofiering less resistance to the wind than the ordinary jointedair-conveying pipes do, quicker action being given and a saving of spaceeffected, the wood case of the swell hitself serving the same purpose asa bulky part of the action of an ordinary organ; also, more room is leftfor the pipes to speak in, in proportion to the slze of the organ.

It willbe understood that my improvements are in part applicable toother pipe-organs than chamber pipe-organs.

Having now particularly described and ascertained the nature of the saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is 1. In a pipe-organ, air-conveying channels for theswell, formed in the thickness of the material of the front of theswell-box, in the manner and for the purposes substantially asdescribed.

2. In a pipe-organ, air-conveying channels formed in the front of theswell-box, com bined with a slide, such as m, for admitting air to theswell, substantially as described.

3. In a pipeorgan, air-conveying channels formed in the front of theswell-box, combined with corresponding ones made in the sound-board,substantially as set forth.

JOSEPH GILDERSLEEVE.

Witnesses:

G. F. REDFERN, JOHN E. BOUSFIELD, Of the firm of G. F. Redfe'm & 00.,4S0uth Street, Finsbury, London, Patent Agents.

